Re: [libcvd-members] gvars3 Makefile.in configure configure.ac gvars...

[Edward Rosten]

On Wed, 20 Feb 2008, Georg Klein wrote:
> foo& foo::getinstance()
> {
>   static foo f;
>   return f;
> }
>
> but the page where I read about this said something along the lines of ``use 
> only when single-threaded.'' Why might that be?

Race conditions on instantiation?

eg in:

if(!inst)
  inst = new fooclass();

return inst

the first two lines aren't atomic.


If it's being used for global constructors, then you don't have to worry 
about threads unless you do something really awesome like pthread_create 
in a global constructer so you get threads before main starts...


-Ed